vcd file working for cosim

2 files changed, 25 insertions, 7 deletions

diff --git a/hdl_lab/hdl/myhdl_wrap.py b/hdl_lab/hdl/myhdl_wrap.py
index 2e8fe4e..56c8c5b 100644
--- a/hdl_lab/hdl/myhdl_wrap.py
+++ b/hdl_lab/hdl/myhdl_wrap.py
@@ -9,6 +9,22 @@ class Myhdl_Wrapper():
     def _export(self, **kargs):
         inst = getattr(self, self.class_name)(**kargs)
         inst.convert(hdl='Verilog', path=GEN_VERILOG, name=f"{self.class_name}")
+
+        test_bench_file = GEN_VERILOG + 'tb_' +self.class_name + '.v'
+        test_bench_tmp_file = GEN_VERILOG + '~tb_' +self.class_name + '.v'
+
+        # this is needed to generate cosim vcd file
+        with open(test_bench_file) as f_old, open(test_bench_tmp_file, 'w') as f_new:
+            lines =  f_old.readlines()
+            for line in lines:
+                f_new.write(line)
+                if 'initial begin' in line:
+                    f_new.write('\n')
+                    f_new.write('    // Needed to create vcd file\n')
+                    f_new.write(f'    $dumpfile ("{SIM_DIR + self.class_name}_cosim.vcd");\n')
+                    f_new.write(f'    $dumpvars(0, tb_{self.class_name});\n')
+                    f_new.write('\n')
+        os.rename(test_bench_tmp_file, test_bench_file)
         
 
 
diff --git a/hdl_lab/hdl/reset_sync.py b/hdl_lab/hdl/reset_sync.py
index 3116b9e..04ccdeb 100644
--- a/hdl_lab/hdl/reset_sync.py
+++ b/hdl_lab/hdl/reset_sync.py
@@ -38,7 +38,7 @@ class ResetSync(Myhdl_Wrapper):
     def tb(self, func: Callable):
         async_reset = Signal(False)
         sync_reset = Signal(False)
-        clk = Signal(bool(0))
+        clk = Signal(False)
 
         dut = func(clk=clk, async_reset=async_reset, sync_reset=sync_reset)
 
@@ -62,24 +62,26 @@ class ResetSync(Myhdl_Wrapper):
 
                 yield clk.posedge, async_reset.negedge
                 if async_reset == True:
-                    assert sync_reset.next == False, 'sync Reset did not wait for second clock positive edge'
+                    yield delay(0)
+                    assert sync_reset == False, 'sync Reset did not wait for second clock positive edge'
 
                     yield clk.posedge, async_reset.negedge
                     if async_reset == True:
-                        assert sync_reset.next == True, 'sync Reset did not set'
+                        yield delay(0)
+                        assert sync_reset == True, 'sync Reset did not set'
 
 
 
         @instance
         def stimulus():
             for _ in range(500):
-                yield delay(randint(1,20))
+                yield delay(randint(0,20))
 
                 if (now()+2) % 4 == 0:  # do not create rising edge of reset and clk at the same time
                     yield(delay(1))
 
                 async_reset.next = True
-                yield delay(randint(1, 20))
+                yield delay(randint(0, 20))
                 async_reset.next = False
 
             raise StopSimulation
@@ -103,7 +105,7 @@ def test_reset_sync_sim():
 def test_reset_sync_cosim():
     hdl = ResetSync()
     hdl.export()
-    # hdl.cosim()
+    hdl.cosim()
 
-# test_reset_sync_sim()
+test_reset_sync_sim()
 test_reset_sync_cosim()